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In dentistry, the reaction force exerted per unit area of the brush during deflection; used interchangeably with firmness in describing toothbrush bristles or filaments; depends primarily on length and diameter of filaments or bristles.


half way to rigidity, tetany; result of insufficient use of the part.

Patient discussion about stiffness

Q. can acupuncture help neck stiffness? I have neck pain- especially stiffness every week- once or twice. Try a lot of things but always comes back. Can acupuncture help? tell me please because if not- I dont want to put needles for nothing...

A. Acupuncture can fix most cases of neck pain, usually in 3-5 treatments. Most neck pain is due to muscular tightness, and acupuncture is very effective at releasing contracted muscles.

here's an article on Acupuncture for Back Pain:

The treatment of neck pain is very similar. There are very few cases of side effects with acupuncture. However, if you experience consistent pain that get progressively worse, you should visit your MD for x-rays and an MRI to rule out any structural problems (bone spurs, disc degeneration, tumors, etc).

Q. I received a corticosteroid injection in my left knne th A.M. Knee is all stiff & swollen. Is this normal?

A. actually you might have already had an arthritis in your knee before, then your doctor injected you with a corticosteroid into the affected joint. usually you will feel better (less pain) in your affected joint. if the symptoms don't improve then I suggest you to go see your specialist for further advise and treatment.

Q. i cant stop getting a hard on erection stiffy embarrassing crease in trousers

A. Have you heard of priapism,a condition in which the penis is continually erect; usually painful and seldom with sexual arousal. If you suffer from this you should go see a doctor about it.

More discussions about stiffness
References in periodicals archive ?
When a constant S-T ratio is maintained, the modulus values are all very similar to the flexural modulus, as shown in Fig.
Figure 6 shows the variation of flexural modulus on kenaf fiber, PALF and mengkuang fiber.
Flexural strength and flexural modulus of okra fiber reinforced polyester composites at highest volume fraction is shown in Fig.
where y is the deflection of the neutral axis and M, I, and E are the bending moment, second moment of inertia, and flexural modulus of the beam, respectively.
In these applications, 40% talc filled, high flexural modulus parts are said to have achieved excellent release by incorporating 0.
about 1 km/min, did show a higher flexural modulus in the preliminary work.
The Accura SI 40 material will produce parts with optical clarity, high flexural modulus and moderate elongation to break, with a high heat deflection temperature allowing it to be drilled, self-tapped and bolted on for true functional testing.
up to 20% elongation at break, and flexural modulus ranging from 305,000 to 335,000 psi, it has the stiffness and toughness of ABS.
Benefits include high flexural modulus and flex fatigue resistance, cold-weather/impact resistance (to-40[degrees]C), strong knit lines, memory and rebound, and competitive pricing.
Testing services are provided for abrasion, brittlepoint, cold flex/ bend, compression deflection, compression set--method B, compression stress relaxation, DeMattia flex, extension fatigue-to-failure, flexural modulus, Gehman or ClashBerg stiffness, heat aging, Izod impact, melt flow index, micro hardness, Mullen burst, ozone resistance, rebound resistance, rubber hardness, specific gravity or density, tear resistance, and more.
They showed that the flexural modulus of neat LCPs could be varied by approximately 10% by changing the mold temperature.